APPOTRONICS CORPORATION LIMITED

APPOTRONICS CORPORATION LIMITED Patent applications

Patent application number

Title

Published

20160124213

COLOR WHEEL ASSEMBLY AND RELATED LIGHT SOURCE SYSTEM THEREOF - A color wheel assembly includes a color wheel fixed in a housing and a detecting apparatus for generating a synchronization signal. The color wheel is driven to rotate and has a marking object rotating with it. The housing has a first surface parallel to and adjacent a surface of the color wheel where the marking object is located. The first surface of the housing has a first through hole at a location within an annular region corresponding to the marking object when the color wheel rotates by one revolution. The detecting apparatus is disposed on the back side of the first through hole and a probe head of the detecting apparatus is disposed in the first through hole for detecting the marking object on the color wheel. The structure insulates the probe head from heat emitted from the color wheel. A related light source system is also disclosed.

WAVELENGTH CONVERSION DEVICE AND RELATED LIGHT EMITTING DEVICE - Disclosed are a wavelength conversion device and a light emitting device. The wavelength conversion device includes a wavelength conversion layer used for absorbing excitation light and generating converted light; a box having a first area used for transmitting the excitation light to the wavelength conversion layer and a second area used for transmitting the converted light, and further including an air outlet and an air inlet; a conduit, disposed outside the box and used for connecting the air inlet and the air outlet, so as to seal with the box the wavelength conversion layer in the box; a heat exchanger, used for decreasing a gas temperature in the conduit; and a gas circulation device, disposed in sealed space encircled by the box and the pipe conduit, and used for driving exchange between gas in the box and gas in the conduit. The wavelength conversion device achieves both dust prevention and heat dissipation.

03-10-2016

20160004147

WAVELENGTH CONVERSION DEVICE, LIGHT-EMITTING DEVICE AND PROJECTION SYSTEM - Disclosed are a wavelength conversion device, a light-emitting device and a projection system, comprising a wavelength conversion layer having a first surface and a second surface opposite each other. The first surface receives an excitation light. The wavelength conversion layer absorbs the excitation to produce a converted light and emits the converted light or the mixture of the converted light and the excitation light from the first surface and the second surface. A scattering reflective substrate is stacked with the wavelength conversion layer and includes a white porous ceramic or a white scattering material for scattering the incident light. The scattering reflective substrate includes a third surface facing the second surface and scatters at least a part of the incident light on the third surface and then emits all the light from the third surface to the second surface.

01-07-2016

20150233550

LIGHT EMITTING DEVICE, LIGHT EMITTING DEVICE ASSEMBLY AND RELEVANT PROJECTION SYSTEM - A light emitting device assembly comprises a wavelength conversion device, a drive device and an adapter. The wavelength conversion device comprises a wavelength conversion layer having at least one wavelength conversion region for receiving an exciting light and converting it into an excited light. The drive device comprises a drive surface used to drive the wavelength conversion device to move, so that a light spot of the exciting light acts on the wavelength conversion device along a preset path. The adapter coaxially connects the drive device and the wavelength conversion device and enables a light ray to arrive at the wavelength conversion device on a side facing the drive device and inside an axial-direction projection of the drive surface on the surface of the wavelength conversion device. The drive surface and the wavelength conversion layer at least partially overlap along the projection surface of the axial projection.

HIGH RECYCLING EFFICIENCY SOLID STATE LIGHT SOURCE DEVICE - A light source device includes a LED light source or a wavelength conversion material having a near Lambertian light emitting surface. The light source device includes a light recycling system to reflect small-angle lights (lights closer to the normal direction of the light emitting surface) back to the light source, and a collection system for collecting and outputting large-angle lights (lights farther away from the normal direction). The lights reflected by the light recycling system is scattered by the emitting surface in all directions, where the large-angle scattered lights are collected by the light collection system and the small-angle scattered light is reflected by the light recycling system again. A second excitation light source without wavelength conversion material or a second light source with its own wavelength conversion material may be provided, and the second light is directed to the light emitting surface by appropriate optical components.

METHOD AND APPARATUS FOR A COLOR FILTER - A method and apparatus for a color filter that utilizes a wavelength conversion material such as phosphor to filter an input light. The input light contains unwanted shorter wavelength light and wanted longer wavelength light. The wavelength conversion material converts the light in the unwanted shorter wavelength range to the wanted longer wavelength range, and transmits the light in the wanted longer wavelength range, to generate an output light in the longer wavelength range. The filter may be a transmissive type of a reflective type. The filter may be constructed as a moving filter such as a rotating wheel.

09-19-2013

20130229634

METHOD AND APPARATUS FOR A SOLID STATE LIGHT SOURCE - A light source device uses a wavelength down conversion material for absorbing an excitation light and generating a converted light, and a color filter for filtering the converted light to generate a different color light as output. The wavelength conversion material is a yellow or green phosphor which absorbs blue or UV light and generates a yellow or green converted light, which has a sufficiently wide spectrum to cover some of the red color region. The color filter only allows the red component of the converted light to be output. This system is more energy efficient than using a red phosphor. This light source may be implemented as a moving phosphor wheel having multiple segments, one of which being the yellow or green phosphor with the corresponding color filter, the other segments being used to generate other colored lights such as green and blue lights.

ILLUMINATION DEVICE, PROJECTING DEVICE AND LIGHTING DEVICE - An illumination device includes a wavelength conversion material layer with a first surface, which includes a wavelength conversion material and a scattering material; a light guide device located adjacent the wavelength conversion material layer on a side facing its first surface for directing an excitation light onto the first surface of the wavelength conversion material layer, and for directing a mixed light emitted from the first surface, which includes converted light and remaining excitation light not absorbed by the wavelength conversion material layer, into a light exit port. In this illumination device, the light guide device can collect the excitation light reflected by the wavelength conversion material layer effectively, which insures that adding scattering materials into the wavelength conversion material layer doesn't have a significant impact on the luminous efficiency of the illumination device, and resolves the conflict between color uniformity and luminous efficiency of the device.

08-01-2013

20130100644

LIGHT SOURCES SYSTEM AND PROJECTION DEVICE USING THE SAME - This invention provides a light source system and a projection device. The light source system includes an excitation light source for generating a excitation light, a wavelength conversion device, a supplemental light source for generating a supplemental light, a light introducing device for directing the supplemental light to the wavelength conversion device, a light collection device for collecting the supplemental light that scattered and reflected by the wavelength conversion device. By setting the relative sizes of the light introducing device and the light collection device, the luminous flux of the supplemental light that is lost due to the light introducing device is less than or equal to a quarter of that the luminous flux of the supplemental light collected by the light collection device. The converted light is supplemented by the supplemental light.

04-25-2013

20130075633

Method and Apparatus of Drive Currents Control Over a Solid State Light Source - A solid state light source module includes two solid state light sources, a light combining device for combining the lights from the two sources, a color wheel receiving the combined light and alternatingly outputting at least two primary color lights, a sync signal generator coupled to the color wheel for generating a periodic sync signal, and a controller for supplying a drive signal to each solid state light sources based on the sync signal. During at least one sub-period of the period, one of the two solid state light sources is turned on by its drive signal and the other one is kept in an inactive state by its drive signal.

03-28-2013

20130070449

HIGH RECYCLING EFFICIENCY SOLID STATE LIGHT SOURCE DEVICE - A light source device includes a LED light source or a wavelength conversion material having a near Lambertian light emitting surface. The light source device includes a light recycling system to reflect small-angle lights (lights closer to the normal direction of the light emitting surface) back to the light source, and a collection system for collecting and outputting large-angle lights (lights farther away from the normal direction). The lights reflected by the light recycling system is scattered by the emitting surface in all directions, where the large-angle scattered lights are collected by the light collection system and the small-angle scattered light is reflected by the light recycling system again. A second excitation light source without wavelength conversion material or a second light source with its own wavelength conversion material may be provided, and the second light is directed to the light emitting surface by appropriate optical components.

03-21-2013

20130063704

METHOD AND APPARATUS OF WHITE BALANCE ADJUSTMENT - A white balance adjustment method and apparatus for a single DLP projector system is disclosed. The projection system includes a solid state light source device, a sync signal generator, and a controller. The light source device generates an output which is a repeating color sequence of at least two primary color lights. The sync signal generator generates a synchronization signal representing a timing of the color sequence of the output light. The controller calculates drive current values corresponding to each of the two primary colors based on a target white balance and measured color properties of the output light, and supplies a modulated drive current to the light source device. The modulated drive current is synchronized to the sync signal and has the calculated drive current values. As a result, a white light having the target white balance is output.

03-14-2013

20130050981

Method and Apparatus for Solid State Illumination - A light source includes two excitation light sources generating two respective excitation lights, a filter, and a wavelength conversion material. The second excitation light has a peak wavelength shorter than that of the first excitation light. The transmittance curves of the filter are dependent on the input angle. The first and second excitation lights are inputted to the filter at angles smaller than a first threshold angle, and angles between the first and a third threshold angle, respectively. Both excitation lights pass through the filter to excite the wavelength conversion material, which generates a converted light but reflects some of the excitation lights. Part of the reflected first excitation light reaches the filter at input angles greater than a second threshold angle and is reflected by the filter back to the wavelength conversion material for recycling. The third and second threshold angles are greater than the first threshold angle.

02-28-2013

20130010013

DISPLAY METHOD AND DISPLAY DEVICE - The present invention relates to a display method and a display device. The display method comprises the following steps: a display screen provided with an optical wavelength conversion layer receives an exciting light which is projected by at least one projection device and carries image information; every projection pixel of an image carried by the exciting light corresponds to a unit optical wavelength conversion material in a series of repeating units which are arranged on the optical wavelength conversion layer according to a predetermined rule; and the exciting light excites the corresponding optical wavelength conversion materials in the repeating units to produce an excited light, and the image is reproduced in the display screen based on every repeating unit. Due to the modulation of a projection light source, the display brightness of the screen can be enhanced and seams of the image can be eliminated.

01-10-2013

20130003368

MULTICOLOR ILLUMINATION DEVICE USING MULTIPLE LIGHT SOURCES AND A MOVING PLATE WITH WAVELENGTH CONVERSION MATERIALS - A multicolor illumination device uses a blue or UV light source to excite wavelength conversion materials and a red light source as a direct illumination light. The lights from the two light sources are combined onto a moving wavelength conversion element. The moving wavelength conversion element includes multiple segments alternatingly disposed in the paths of the incident lights, including a first segment with no wavelength conversion material, and other segments which may carry blue, green and/or yellow wavelength conversion materials. A control system controls the on/off of the two light sources so that when the first segment is in the light path, the red light source is on and the blue/UV light source is off, and vice versa when the other segments are in the light path. Alternatively, dichroic filters may be fixedly provided on the segments of the wavelength conversion element to block the blue/UV or red light.

LIGHT SOURCE, WAVELENGHT CONVERSION METHOD, WAVELENGHT CONVERSION DEVICE, AND SYSTEM FOR LIGHT SOURCE - A light source device includes a light emitting element and a wavelength conversion device. The wavelength conversion device includes a stationary member, a moveable carrier made of a transparent material carrying one or more wavelength conversion materials and moveable relative to the stationary member, and a stationary first filter. The first filter is fixed on the stationary member and disposed adjacent the moveable carrier. The excitation light from the light emitting element passes through the first filter and illuminates the wavelength conversion materials on the moveable carrier. The wavelength conversion materials convert the excitation light into converted light as the output of the light source device. The size of the first filter is smaller than the size of the moveable carrier and smaller than a carrying area of the moveable carrier that carries the wavelength conversion material. A wavelength conversion method using the wavelength conversion device is also described.

03-22-2012

20110249436

HIGH BRIGHTNESS ILLUMINATION DEVICE USING DOUBLE-SIDED EXCITATION OF WAVELENGTH CONVERSION MATERIALS - An illumination devices using excitation light and a wavelength conversion material to generated converted light for illumination, where the wavelength conversion material is excited by multiple excitation lights from both sides to achieve increased brightness. The excitation lights incident on the two sides of the wavelength conversion material may have the same color or different colors. Light separation structures are provided on both sides of the wavelength conversion material to separate the excitation light and the converted light. Light separation may be based on color difference or etendue difference of the excitation light and converted light. In one particular example, wavelength conversion material is formed on a surface of an LED which acts as the first excitation light source, and a second excitation light is delivered through a light separation structure onto the other side of the wavelength conversion material.